Hey Nouha, thanks for the message and sharing the link! It looks like we've got a bug on our hands - I've escalated this over to our engineering team and we'll let you know as soon as we know more!
The workaround I can suggest is to first import a list of companies with the specified size using Find Companies, that should work fine. Then Find People at those companies without adding the size filter. We'll look into the issue!
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